html {
    width: 100%;
    height: 100%;
}
body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    min-height: 700px;
    min-width: 1300px;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    font-family: Helvetica Neue, Helvetica, PingFang SC, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;
  }
  #app {
    width: 100%;  
    height: 100%;
    overflow: hidden;
  }